Former President Donald Trump and Vice President Kamala Harris are neck and neck nationally, but Trump has the momentum after surging three points in a month, according to a Marist/NPR/PBS News poll. The September 3-5 poll, published Tuesday, finds 48 percent of 1,413 registered voters sampled back Trump, while 49 percent back Harris. One percent is undecided, and one percent would support a third-party candidate. Trump has gained three points of support since the Marist/NPR/PBS News August 1-4 poll, when he landed at 45 percent with registered voters in a field with third-party options. That poll showed him three points...